Miter saw support base



FIG. 1 is a bottom perspective view of a miter saw support base showing our new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a right side elevational view the opposite side being a mirror image;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a miter saw support base, as shown and described. 